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A portion of eastbound Route 22 was closed temporarily as part of the investigation. There is a crosswalk in one area of the intersection but not on the opposite side of the intersection. It is not clear if Anderson was in the crosswalk, but a witness who called police said traffic on Route 22 had the green light at the time Anderson was hit.

"The light was green near the intersection where (Anderson) was traveling, and (the witness) thought, 'It would be dangerous for her to be traveling when the east and westbound lanes have a green light,'" Trooper Stephen Limani said.

Andersons's sister, Rachel Noel, said Anderson had suffered a serious head injury previously and that she drove Anderson everywhere. Noel said Anderson told her that a friend from Derry would be picking her up on Sunday night, so Noel left to get a pizza. When she returned, Anderson was gone. Noel said it was very unusual for Anderson to go for a walk, especially a long walk.

Noel said Anderson was able to spend the day at the Delmont Apple Festival. Noel said she wants her sister to be remembered as a loving and kind woman who was able to spend some of her final hours with her family.

State police from the Kiski Valley are investigating. At this point, Limani said state police are not filing charges because it appears to be an accident.

Limani said the driver who hit Anderson initially thought he had hit an animal, so he pulled over and noticed the vehicle was leaking fluids. Limani said his wife called their insurance company and they then returned to their Indiana County home. Once there, Limani said the couple saw a Facebook post about a woman who was hit and killed on Route 22 around the time he hit something, so they drove back to the scene to allow state police to search the vehicle and question them.